error[E0119]: conflicting implementations of trait `Foo` for type `i16` --> $DIR/coherence-overlap-upstream.rs:13:1 | LL | impl Foo for T where T: Remote {} | --------------------------------- first implementation here LL | impl Foo for i16 {} | ^^^^^^^^^^^^^^^^ conflicting implementation for `i16` | = note: upstream crates may add a new impl of trait `coherence_lib::Remote` for type `i16` in future versions error: aborting due to previous error For more information about this error, try `rustc --explain E0119`.